Scroll to see break-even price per barrel for oil in 2015 for select oil producers, and click on a country's name for more details. modest oil-price recovery and currency devaluations have lowered breakeven prices for countries like Russia and Nigeria, but some petrostates still need oil prices above $100 a barrel to balance their budgets.
There are dozens of types of gemstones â including diamonds, colored gemstones, and pearls â each with a unique set of physical and optical properties. GIRDLE â The narrow band around the perimeter of a polished or faceted diamond or colored gemstone.
Amethyst is a transparent variety of quartz that ranges from light lilac to deep purple in color. It is one of the most popular faceted gemstones and is sometimes cut en cabochon. It is found in many locations around the world.methyst is a transparent variety of quartz that ranges from light lilac to deep purple in color. It is one of the most popular faceted gemstones and is sometimes cut en cabochon. It is found in many locations around the world.